Sash-pulley.



No. 818,231. PATENTED APR.1'7, 1906. D. G. CLARK.

SASH PULLEY.

APPLICATION FILED MAY5,1905.

INVENTOR. flW/GHT 6 614 EV W v A TTORNE Y5.

DWIGHT G. CLARK, OF PLAINVILLE, CONNECTICUT.

SASH PULLEY.

Specification of Letters Patent.

Patented April 17, 1906.

Application filed May 5, 1905. $erial No. 259,002.

T0 at whom it may concern:

Be it known that I, DWIGHT G. CLARK, a ci tizen of the United States,residing at Plainville, Hartford county, State of Connecticut, haveinvented certain new and useful Improvements in Sash-Pulleys, of whichthe following is a full, clear, and exact description. My inventionrelates to improvements in sash-pulleys, and particularly to thepulleyframe and sash-cord guide.

The object of the invention is to provide an improved construction andmeans of assembling and securing a face-plate to the rear portion orcase in such a manner that the strains of use will be effectivelywithstood. Incidentally simplicity and economy of production are aimedat.

In the accompanying drawings, Figure 1 is a side elevation of myinvention. Fig. 2 is a plan view thereof. Fig. 3 is a horizontal section of the case and face-plate shown in Figs. 1 and 2. Fig. 4 is a viewof the inner side of the face-plate detached.

1 is a face-plate formed of sheet metal and provided with an elongatedor oval slot in its face. slot is countersunk or extended back to form acentering member including two flanges 2. It will be seen that thiscentering member is in common to all of the modifications shown in thedrawings.

3 is the case proper, formed of sheet metal from one or more pieces, asdesired. The case 3 is oval in end elevation and is arranged to holdbetween its side walls the pulley 4, the latter being mounted on a pivot5. The case 3 is centered by the aforesaid centering member when theparts are assembled, so that it is always held in the proper positionrelatively to the face-plate and cannot slip. In the preferred form theside edges of the case 3 are bent outwardly, as at 3 3 and then given asharp inward bend to form a shoulder bearing against the back plate 1and against the sides of the centering device. (See Figs. 1 to 3.) Thesaid edges 2 2 of the latter are then expanded outward, so as to clampthe edge of the case securely in place and so as to bear against theinner wall of the 1 bends 3 3 to reinforce and further strengthen andsupport said case. This is the preferred form of the invention and is ofgreat value, since it provides a neatly-rounded bearing at the inneredge of the face-platel for the sashpulley 4 and prevents chafing thesash-cord.

Instead of providing the outward bend 3 The metal displaced in formingsaid at the side edges of the case 3 this may be eliminated, as shown inFig. 4:, said side edges being arranged parallel throughout, save at theextreme forward edges, which are turned abruptly in, as at 3 3 toprovide a seat for the turned-back flange 2 of the face-plate 1. By thismeans the parts may be secured together simply and inexpensively, and,as before, a rounded bearing is provided at the inner edge of theface-plate for the pulley or sash-cord, or both.

In Fig. 5 instead of providing the side edges of the case 3 with an,inward bend, as shown inFigs. 3 and 4, I flare the same outwardly, asindicated at 3 3. The centering means is present, as before, while theextreme outer side edges of the plate 1 are folded back, as at 1 1 anddown upon the flared edges 3 3 of the case, securely holding and unitingsaid parts. In this case the rounded bearing is also provided in ameasure for the pulley or sash-cord, or both.

It will be seen that very substantial advantages are gained by thiscombination and arrangement of parts, since not only are the samesecurely held, but a permanent and uniform position is given to the twomain mem bers 1 and 3. Beyond this the flanges 2 2, in addition tocentering and supporting the side Walls of the case 3, perform thefunction of stiffening the plate 1, permitting the use of thinner metalthan would otherwise be practicable. The invention also admits of theuseful disposition of metal that would otherwise be wasted in strikingout the oval hole in said face-plate. While in the preferred form thecase 3 is made of a single piece of metal, obviously this is notessential to the invention; but it will be seen that when the same ismade up of a plurality of pieces the same separate parts. will be moreeffectively held by the construction set forth above than would be thecase were no centering means or flanges 2 2 provided.

What I claim is 1. In a device of the character described, a face-platehaving an elongated slot therein, a portion of the metal displaced informing said slot being extended rearwardly and forming a stiifeningwebextending entirely around said slot and also forming a case-centeringdevice, a case bearing on the outer side of said centering device, aportion of the metal of said faceplate being bent down to afford meansfor clamping said case securely against said face-plate the side edgesof said case being bent outward and doubled back beneath the bent-downportion of the face-plate.

2. In a device of the character described, a face-plate having anelongated slot therein, a portion of the metal displaced in forming saidslot being extended rearwardly and forming a stiffening-web extendingentirely around said slot, and also forming a case-centering device, acase bearing on the outer side of said centering device and means forclamping said case securely against said face-plate, said meanscomprising long flanges at the opposite side edges of said casesubstantially at right angles to the body of the case, and aturned-back-portion of the stifl'eningweb of DWIGHT G. CLARK.

Witnesses A. V. BRooK, N. E. CLARK.

